<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>vue add cdn</title>
    <!--vue cdn-->
    <script src="https://cdn.jsdelivr.net/npm/vue/dist/vue.js"></script>
</head>
<body>
    <div id="app">{{ message }}</div>
    <script>
        new Vue({
            el: "#app",
            data() {
                return {
                    message: "hello vue"
                }
            }
        });
    </script>
</body>
</html>